KR101258435B1 - Washing machine - Google Patents

Abstract

The present invention relates to a washing machine including a drain pump for discharging the washing machine to the outside after washing operation.

It is an object of the present invention to provide a washing machine having a drainage pump, in which operating noise is reduced, pumping performance is improved, and residual water is not left after the end of the water process.

Washing machine according to the present invention in order to achieve this object is a drain motor, an impeller rotating by the drain motor, the vortex chamber to form the exterior and the impeller is rotatably installed therein and the discharge of the water in the vortex chamber discharged And a pump casing provided with a flow path, wherein an inner wall of the discharge flow path includes a side wall extending from a circumferential side wall of the vortex chamber, and a vertical wall extending in parallel with upper and lower walls of the vortex chamber, respectively. With a pump.

Description

Washing machine

1 is a cross-sectional view showing the internal structure of a washing machine according to an embodiment of the present invention.

Figure 2 is a cross-sectional perspective view showing the internal structure of the drain pump according to an embodiment of the present invention.

3 is an enlarged perspective view showing the connection portion between the vortex chamber and the discharge port.

4 is a front view showing an entry portion between the vortex chamber and the discharge port.

5 is a cross-sectional perspective view showing the internal structure of a conventional drainage pump.

Figure 6 is a front view showing the entrance of the conventional drain pump.

Description of the Related Art [0002]

      1: case, 2: tank,

      3: rotating tank, 4: driving motor,

      5: water supply device, 30: drainage pump,

      40: pump casing, 41: vortex chamber,

      42: suction port, 43: discharge port,

      50: impeller,

The present invention relates to a washing machine, and more particularly, to a washing machine including a drain pump for discharging the washing machine to the outside after washing operation.

In general, a washing machine is a device for washing laundry by applying kinetic energy to laundry and washing water, and a drum washing machine in which laundry is washed by a drop generated when a drum installed in a horizontal direction rotates, and a pulsator. There is a vertical axis washer that washes the laundry by the flow of water generated when the rotation.

The washing machine is provided with a drainage device for pumping the wash water to discharge the wash water in the water tank after washing, and the drainage device is disposed in the drain hose for guiding the water to be discharged from the water tank to the outside. And it includes a drain pump for pumping the wash water to be discharged to the outside along the drain hose.

At this time, the drain pump is provided with a drive motor for generating a rotational force, an impeller coupled to rotate on the axis of rotation of the drive motor, and a pump casing in which the impeller is accommodated.

Inside the pump casing is provided a vortex chamber formed in a structure surrounding the impeller to convert the kinetic energy of the water flow generated by the impeller into pressure, the vortex chamber is connected to the discharge port so that the pressurized water is discharged.

Figure 4 is a perspective view showing the internal structure of a conventional drain pump, the structure of the vortex chamber and the discharge port is shown.

The flow path cross section of the discharge port 62 has a circular shape, and the vortex chamber 61 is formed so that the inner wall is perpendicular to each other and the upper and lower walls arranged in the axial direction of the impeller are arranged in the outer diameter direction of the impeller (not shown). . Therefore, due to the shape difference between the discharge port 62 and the vortex chamber 61, a sudden cross-sectional change occurs at the connection portion connecting the discharge port 62 and the vortex chamber 61.

The rapid cross-sectional change of the flow path generated bubbles in the vortex chamber 61, thereby causing noise. As shown in FIG. 6, the entry of the flow path adjacent to the discharge port 62 of the side wall of the vortex chamber 61 is shown. The incidence angle between the center line of the vortex chamber 61 and the side wall of the vortex chamber 61 forms an acute angle in the region of the portion 61a, and the water discharged to the discharge port 62 tends to swing along the inner wall of the discharge port 62. This becomes severe, which is a factor that inhibits smooth discharge.

 Therefore, the conventional drainage pump has a problem in that the discharge resistance of the entire drainage pump is reduced due to the large flow resistance that hinders the flow as described above at the portion where the vortex chamber and the discharge port are connected, thereby increasing the drainage time.

Since the discharge port 62 is provided at the upper portion of the pump casing 60 for lifting, when the draining process is finished and the operation of the draining pump is stopped, the remaining water remains in the lower portion of the vortex chamber 61. There is a problem that the impeller is constrained to cause damage to the impeller, drive motor failure.

In order to solve this problem, it is an object of the present invention to provide a washing machine having a drain pump in which operating noise is reduced and pumping performance is improved.

Still another object of the present invention is to provide a washing machine having a drain pump in which residual water does not remain after the draining process is completed.

In order to achieve the above object, the washing machine according to the present invention is a draining motor, an impeller rotating by the draining motor, forming an exterior and the swirl chamber in which the impeller is rotatably installed therein and the water in the swirl chamber is discharged. And a pump casing provided with a discharge passage, wherein an inner wall of the discharge passage includes sidewalls extending from the circumferential sidewall of the vortex chamber, and upper and lower walls extending in parallel with upper and lower walls of the vortex chamber, respectively. A drain pump is provided.

In addition, a predetermined region of the side wall of the vortex chamber adjacent to the discharge passage is provided as an entry portion, and the vortex chamber so that the entry angle between the center line of the vortex chamber and the side wall of the vortex chamber is an obtuse angle in the entry portion region. The side wall of is formed.

In addition, the bottom of the inner wall of the vortex chamber is characterized in that the residual water discharge port is provided to discharge the residual water of the vortex chamber.

In addition, the side wall and the upper and lower walls of the vortex chamber are perpendicular to each other, the inner wall of the discharge passage is characterized in that the overall formed in a square.

In addition, a rounding part having a predetermined curvature is provided between the side wall and the upper and lower walls of the vortex chamber and the side wall and the upper and lower walls of the discharge passage.

The pump casing according to the present invention is provided with a vortex chamber in which an impeller is rotatably installed therein, and a discharge passage through which water in the vortex chamber is discharged, and an inner wall of the discharge passage extends from a circumferential sidewall of the vortex chamber. And side walls and upper and lower walls extending in parallel with the upper and lower walls of the vortex chamber, respectively.

Hereinafter, with reference to the accompanying drawings looks at in detail a preferred embodiment of the present invention.

Washing machine according to an embodiment of the present invention, the case (1) forming the appearance of the washing machine, the drum-shaped tank (2) is installed so as to be suspended in the inside of the case (1) containing water, and the water tank (2) is rotatably installed inside the rotating tub (3) having a plurality of dehydration holes (3a) on the surface, the rotating tub (3) by rotating the washing stroke, rinsing stroke, and dehydration stroke It includes a drive motor (4).

In addition, a water supply device 5 for supplying detergent and water into the water tank 2, and a drainage device 10 for draining the wash water in the water tank 2 to the outside.

The front of the water tank (2) and the rotating tank (3) is open to put the laundry to be washed into the inside of the rotating tank (3) or to take out the laundry after washing in the rotating tank (3), the front of the case (1) The door 6 for opening and closing the open front of the water tank 2 and the rotating tank 3 is hinged.

On the inner circumferential surface of the rotary tub 3, a plurality of lifters 3b for lifting the laundry from the lower portion of the rotary tub 3 to the top are arranged at regular intervals.

The water supply device 5 is provided on the inner upper part of the case 1, a water supply hose 5a for receiving laundry water from an external water source, and a detergent container for mixing the detergent with the wash water and sending it to the water tank 2. (5b).

Therefore, when the drum washing machine is operated after the door 6 is opened and the laundry is put into the rotary tub 3, the washing water mixed with detergent is supplied to the tank 2 through the water supply device 5, and the rotary tub 3 is supplied. By the rotation of the laundry is lifted upward along the lifter (3b) to fall downward so that the laundry is washed.

A drainage device 10 is provided at an inner lower portion of the case 1 of the washing machine according to the present invention, and the drainage device 10 is a drain hose for draining the wash water contained in the water tank 2 to the outside of the case 1. 21 and 22 and the drain pump 30.

2 and 3, the drain pump 30 forms an exterior and is rotatably installed inside the pump casing 40 and a pump casing 40 having a vortex chamber 41 therein. Impeller 50 for generating a water flow for forcibly discharging the wash water of the water tank 2, and a drain motor (not shown) provided on the rear side of the impeller 50 to provide a driving force to the impeller 50 do.

In the center of the vortex chamber 41 is provided with a suction port 42 through which the wash water to be pumped is introduced, and a pump filter (not shown) coupled to the pump casing 40 to collect foreign substances contained in the wash water. It is placed in the forward flow path.

The inner wall of the vortex chamber 41 is formed so that each part has a predetermined curvature about the rotation axis of the impeller 50 so as to guide the water flow generated from the impeller 50 and the side wall 41a disposed in the circumferential direction of the vortex chamber. And an upper and lower wall 41b horizontally formed with the impeller 50 above and below the rotation axis direction of the impeller 50.

The side wall 43 of the vortex chamber 41 is provided, and the inner wall of the discharge channel 43 is prevented in order to prevent a sudden change in the cross-sectional area of the flow path at the connection portion between the inner wall of the vortex chamber 41 and the inner wall of the discharge channel 43. And a side wall 43a and an upper and lower wall 43b extending from the side walls 41a and the upper and lower walls 41b of the vortex chamber 41, respectively, so that the cross-sectional shape of the discharge passage 43 is formed in the vortex chamber ( In the cross-sectional shape of 41, the side wall 41a of the vortex chamber and the side wall 43a of the discharge flow path 43 are provided in the same cross-sectional shape.

According to the present embodiment, as the inner wall of the vortex chamber 43 is formed with the side walls 41b and the upper and lower walls 41a perpendicular to each other, the inner wall of the discharge passage 43 is also formed correspondingly, so that the interior of the discharge passage 43 The flow path is generally rectangular in shape.

Therefore, the inner wall of the vortex chamber 41 and the inner wall of the discharge flow path 43 are connected in a continuous shape without a step or jaw structure caused by a sudden change in cross section.

In order to reduce the flow resistance due to the vortex and the like at the corners, the side wall 41a and the upper and lower walls 41b of the vortex chamber 41 and the side wall 43a and the upper and lower walls 43b of the discharge passage 43 are predetermined. The rounding part 41c may be formed to have a curvature of rounding, and the rounding part 41c may be formed in a curved shape. The rounding part 43c which has a can be formed.

In addition, a predetermined region adjacent to the discharge passage 43 among the sidewalls 41a of the vortex chamber 41 is provided as an entry portion 41d. In the region of the entry portion 41d, the center line of the vortex chamber 41 The side wall 41a of the vortex chamber 41 is formed in the tangential direction so that the entry angle formed by the side wall 41a of the vortex chamber 41 becomes an obtuse angle.

The shape of the side wall 41a of the obtuse-shaped vortex chamber 41 in the region of the entry portion 41d causes the angle of entry into the discharge passage 43 along the side wall 41a of the vortex chamber 41 to be smooth. This is to reduce the resistance due to the vortex of the discharge water in the discharge passage 43.

In addition, a residual water discharge port 44 is provided below the vortex chamber 41, and the residual water discharge port 44 communicates with the outside of the pump casing 40.

This is to remove the residual water remaining in the lower portion of the vortex chamber 41 after the draining process is finished, the residual water outlet 44 is a vortex like a drain filter so that the residual water in the vortex chamber 41 can be naturally drained by a drop. It is connected with the flow path located lower than the seal 41.

According to the illustrated embodiment, the inner wall of the vortex chamber 41 is formed of the side wall 41a and the upper and lower walls 41b, and thus the inner wall of the discharge passage 43 also has a rectangular shape. By preventing a sudden decrease in the cross-sectional area of the flow path at the connection between the flow paths 43, more various deformations may be possible within the range in which the two flow paths can be naturally connected.

For example, the side walls 41a and 43a of the vortex chamber 41 may have a curved shape, and thus the inner cross section of the discharge passage 43 may have a substantially elliptical shape.

As such, when the structures of the vortex chamber and the discharge passage according to the present invention are applied to the drainage pump, the discharge flow rate is increased compared to the conventional drainage pump, and the vortex chamber according to the present invention is applied to the drainage pump in which the discharge flow rate was 16 L / min. And when the discharge flow path structure is applied, the discharge flow rate was increased by 5L / min to 21L / min, it was confirmed through the experiment that the overall discharge flow rate improved more than 30%.

As described above, the washing machine according to the present invention has a shape of the vortex chamber and the discharge passage so as to be naturally connected between the vortex chamber and the discharge passage without sudden change in the shape of the flow passage.

Therefore, voids and surging noises are prevented from occurring due to rapid pressure changes in the vortex chamber, thereby reducing operating noise, reducing flow resistance, and improving the pumping efficiency as a whole. This increases the drainage time is shortened by the increased flow rate.

In addition, when the drainage process is completed and the drain pump is stopped, the remaining water in the vortex chamber is drained out of the vortex chamber through the residual water outlet, so the impeller is constrained by the residual water in the vortex chamber during winter and the impeller is damaged. There is an effect that the failure is prevented.

Claims (9)

A case forming an appearance; A drum-shaped water tank disposed inside the case to contain wash water; Includes; a drain pump to drain the wash water in the tank to the outside, The drain pump, Drain motor; An impeller rotating by the drain motor; A vortex chamber forming an appearance and rotatably installed therein; A suction port provided at one side of the vortex chamber so that the washing water to be pumped from the tank is introduced; And a pump casing provided with a discharge passage through which water in the vortex chamber is discharged. The inner wall of the discharge passage includes a side wall extending from the circumferential side wall of the vortex chamber and an upper and lower wall extending in parallel with the upper and lower walls of the vortex chamber, respectively. A first rounding portion is formed between the sidewalls and the top and bottom walls of the vortex chamber and between the sidewalls and the top and bottom walls of the discharge passage, and a second rounding portion is formed at the connection portion between the sidewall of the discharge passage and the sidewall of the vortex chamber. Washing machine. The method of claim 1, wherein a predetermined region of the side wall of the vortex chamber adjacent to the discharge passage is provided as an entry portion, and an entry angle between the center line of the vortex chamber and the side wall of the vortex chamber is an obtuse angle within the entry portion region. Washer, characterized in that the side wall of the vortex chamber is formed as possible. The washing machine according to claim 1, wherein a residual water discharge port is provided under the inner wall of the vortex chamber so as to discharge the residual water of the vortex chamber. The washing machine according to claim 1, wherein the side walls and the upper and lower walls of the vortex chamber are perpendicular to each other, and the inner wall of the discharge passage is formed in a quadrangular shape.       The washing machine according to claim 1, wherein a rounding part having a predetermined curvature is provided between the side walls and the upper and lower walls of the vortex chamber and the side walls and the upper and lower walls of the discharge passage. delete delete delete A case forming an appearance; A drum-shaped water tank disposed inside the case to contain wash water; Includes; a drain pump to drain the wash water in the tank to the outside, The drain pump, Drain motor; An impeller rotating by the drain motor; A vortex chamber forming an appearance and rotatably installed therein; A suction port provided at the center of the vortex chamber so that the washing water to be pumped is introduced; And a pump casing provided with a discharge passage through which water in the vortex chamber is discharged. The vortex chamber further includes a residual water discharge port disposed under the vortex chamber so as to naturally drain the residual water in the vortex chamber and provided to communicate with the outside of the pump casing.

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